mini-cards/app/src/main/java/com/codigoparallevar/minicards/DrawView.java

package com.codigoparallevar.minicards;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.Log;
import android.view.View;

import com.codigoparallevar.minicards.parts.Part;
import com.codigoparallevar.minicards.parts.Placeholder;
import com.codigoparallevar.minicards.parts.buttons.RoundButton;

import java.util.LinkedList;
import java.util.List;

class DrawView extends View {

    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    List<Part> parts = new LinkedList<>();

    public DrawView(Context context) {
        super(context);
        paint.setColor(Color.RED);
        parts.add(new RoundButton(500, 1200, 80, 100));
    }

    @Override
    public void onDraw(Canvas canvas){
        long time = System.currentTimeMillis();
        for (Part part : parts){
            part.draw(canvas);
        }

        Log.d("Render time", System.currentTimeMillis() - time + "ms");
    }
}